Question

我的代码中出现上述错误，但我不知道如何解决，请帮我解决。

我已经提供了该代码。

NSMutableDictionary *dictNewHour = [[NSMutableDictionary alloc]init];
    if (_datedetailsArray.count > 0){
        for (int i = 0; i < _datedetailsArray.count; i++){
            if ([[_datedetailsArray[i] valueForKey:@"totalhours"] isEqualToString:@"4"]) -----> **In this line I have that error**{
                NSString *new4Hour = [NSString stringWithFormat:@"%@, %@",[_datedetailsArray[i] valueForKey:@"totalhours"],fourOnly];
                [dictNewHour setObject:new4Hour forKey:@"totalhours"];
                [fourHoursArray addObject:dictNewHour];
                NSLog(@"fourHoursArray is:%@",fourHoursArray);
                NSLog(@"fourHoursArray count is:%lu",(unsigned long)fourHoursArray.count);

                append4String = [NSString stringWithFormat: @"%@ %lu %@", hr4String, (unsigned long)fourHoursArray.count, daysString];

                NSLog(@"append4String is:%@",append4String);
            }

Answer 1

＆＃34; isEqualToString＆＃34;是NSString类方法，您正在使用NSArray对象访问此方法所以请检查数据

exception＆＃39; NSInvalidArgumentException＆＃39;，＆＃39; - [__ NSArrayI isEqualToString：]：无法识别的选择器发送到实例0x17a1d170＆＃39;

1 个答案: